JP6993737B2 - Decomposition treatment liquid for resin molded body - Google Patents

Decomposition treatment liquid for resin molded body Download PDF

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JP6993737B2
JP6993737B2 JP2020167025A JP2020167025A JP6993737B2 JP 6993737 B2 JP6993737 B2 JP 6993737B2 JP 2020167025 A JP2020167025 A JP 2020167025A JP 2020167025 A JP2020167025 A JP 2020167025A JP 6993737 B2 JP6993737 B2 JP 6993737B2
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resin molded
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treatment liquid
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績 冨山
プレシアード クラウディオ アウグスト フェルナンデス
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Description

本発明は、樹脂成型体の分解処理液に関するものである。 The present invention relates to a decomposition treatment liquid for a resin molded body.

例えば、フィルム・シート、包装容器、機械用部品といった合成樹脂製品には、機械的強度、耐水性、耐薬品性といった物理的性質の観点から熱可塑性樹脂が好んで用いられている。熱可塑性樹脂の中でも、特に、ポリエチレン、ポリプロピレンといった所謂、オレフィン系樹脂に分類されるこれらの樹脂は、年間樹脂総生産量の約4割以上を占め、農業、水産業等の一次産業、製造業、建設業といった二次産業を問わず各方面において多用されている。 For example, in synthetic resin products such as films / sheets, packaging containers, and mechanical parts, thermoplastic resins are preferably used from the viewpoint of physical properties such as mechanical strength, water resistance, and chemical resistance. Among thermoplastic resins, these resins, which are classified as so-called olefin resins such as polyethylene and polypropylene, account for more than 40% of the total annual resin production, and are used in primary industries such as agriculture and fisheries, and manufacturing industries. , It is widely used in various fields regardless of secondary industries such as the construction industry.

例えば、農業用マルチフィルムは、畑の保水、保肥、雑草が生えるのを防止する上で用いられ、ポリエチレンを主原料とするものが多い。農業用マルチフィルムは、その機械的強度、耐水性といった優れた物理的性質から農作物の生育に寄与するものであるが、農作物の収穫が完了し、その目的が達成されると、それらのマルチフィルムは、手作業により農作地から撤去しなくてはならず、高齢化が進む農業従事者においては、大きな労働負担であり、また、それらのマルチフィルムは、産業廃棄物として有償廃棄されるため、各農家における経済的負担も大きい。廃棄されたマルチフィルムをリサイクルする手法もあるが、大掛かりで高額な装置が必要であること、更には、土などの成分を全て洗浄することは困難なため、再度、農業用のマルチフィルムへのリサイクルはできていないのが現状である。また、回収し焼却処分したとしても、マルチフィルムに付着した不純物等により有害な煙が発生するリスクも大きい。そこで、農作物の収穫後は、速やかに自然環境中で分解されるマルチフィルムへの要求は、非常に大きいのは明白である。 For example, agricultural mulch films are used to retain water in fields, retain fertilizer, and prevent weeds from growing, and many of them use polyethylene as the main raw material. Agricultural multi-films contribute to the growth of crops due to their excellent physical properties such as mechanical strength and water resistance. Once the crops have been harvested and their objectives have been achieved, those multi-films have been achieved. Must be manually removed from the farmland, which is a heavy labor burden for aging farmers, and their multi-films are disposed of as industrial waste for a fee. The financial burden on each farmer is also great. There is also a method of recycling the discarded mulch film, but since it requires large-scale and expensive equipment and it is difficult to wash all the components such as soil, it is necessary to recycle the mulch film for agriculture. The current situation is that it has not been recycled. In addition, even if the film is collected and incinerated, there is a high risk that harmful smoke will be generated due to impurities and the like adhering to the mulch film. Therefore, it is clear that the demand for mulch films, which are rapidly decomposed in the natural environment after harvesting crops, is very large.

このような状況を鑑みて、例えば、特許文献1には、不要になった日用品、家具等あるいはあらゆる分野における合成樹脂製品を土中への埋め込みあるいは焼却処分する等公害発生、環境破壊の元となる処分手段をとらずとも、毒性、危険性物質を生ずることなく分解することが可能である合成樹脂製品の製造方法について開示されている。 In view of this situation, for example, Patent Document 1 states that unnecessary daily necessities, furniture, etc., or synthetic resin products in all fields are embedded in the soil or incinerated, causing pollution and environmental destruction. Disclosed is a method for producing a synthetic resin product, which can be decomposed without producing toxic or dangerous substances without taking any disposal means.

特開2001-294761号公報Japanese Unexamined Patent Publication No. 2001-294716

特許文献1記載の技術は、製品製造工程において合成樹脂材に合成樹脂材分解成分を添加して合成樹脂製品を成形するものである。合成樹脂材分解成分は、熱可塑性樹脂に対する直接的生分解成分と、酸化可能成分と、遷移金属成分と、非金属安定化成分とからなるものであるとされ、当該熱可塑性樹脂の分解開始は、ヒンダードフェノールからなる非金属安定化成分によってコントロールされている。 The technique described in Patent Document 1 is for molding a synthetic resin product by adding a synthetic resin material decomposition component to the synthetic resin material in the product manufacturing process. The synthetic resin material decomposition component is said to be composed of a direct biodecomposition component for the thermoplastic resin, an oxidizable component, a transition metal component, and a non-metal stabilizing component, and the decomposition of the thermoplastic resin is started. It is controlled by a non-metal stabilizing component consisting of hindered phenol.

しかしながら、熱可塑性樹脂の分解過程の開始を遅延させる非金属安定化成分は製品製造工程において添加されるものであり、熱可塑性樹脂の分解開始時期を厳密に制御することは困難である。また、合成樹脂材分解成分として直接的生分解性成分と、酸化可能成分と、遷移金属成分と、非金属安定化成分とを熱可塑性樹脂に添加する必要があるため、成型加工が困難であるとともに、本来熱可塑性樹脂が奏する機械的強度、耐水性、耐薬品性が低下する恐れもある。 However, the non-metal stabilizing component that delays the start of the decomposition process of the thermoplastic resin is added in the product manufacturing process, and it is difficult to strictly control the decomposition start time of the thermoplastic resin. In addition, it is difficult to mold because it is necessary to add a directly biodegradable component, an oxidizable component, a transition metal component, and a non-metal stabilizing component to the thermoplastic resin as the decomposition component of the synthetic resin material. At the same time, the mechanical strength, water resistance, and chemical resistance originally exhibited by the thermoplastic resin may decrease.

本発明はこのような実状に鑑みてなされたものであり、本発明は、熱可塑性樹脂、特に、ポリオレフィン系樹脂を主原料とする樹脂成型体において、製造時の機械的強度、耐水性、耐薬品性を損なうことなく、また、特定の処分手段を取らずとも当該樹脂成型体の分解処理が可能な樹脂成型体の分解処理液を提供することである。 The present invention has been made in view of such an actual situation, and the present invention relates to a resin molded body made of a thermoplastic resin, particularly a polyolefin resin, as a main raw material, and has mechanical strength, water resistance, and resistance at the time of manufacture. It is an object of the present invention to provide a decomposition treatment liquid for a resin molded body, which can be decomposed without impairing the chemical properties and without taking specific disposal means.

本願発明者らは、上記課題を解決するために鋭意研究した結果、酸化数が異なる複数の脂肪酸金属塩を含む分解処理液を塗布、散布、噴霧、又は浸漬の何れの手法により樹脂成型体に付着させることにより、上記課題を解決することができることを見出し、本発明を完成するに至った。 As a result of diligent research to solve the above problems, the inventors of the present application applied a decomposition treatment liquid containing a plurality of fatty acid metal salts having different oxidation numbers to a resin molded product by any method of coating, spraying, spraying, or dipping. We have found that the above problems can be solved by adhering them, and have completed the present invention.

すなわち、本発明の第1の発明によれば、熱可塑性樹脂を主原料とする樹脂成型体を分解処理する際に、塗布、散布、噴霧、又は浸漬の何れかの手法により前記樹脂成型体に付着される樹脂成型体の分解処理液であって、該分解処理液はオレイン酸マンガン及びオレイン酸セリウムを含むことを特徴とする樹脂成型体の分解処理液が提供される。 That is, according to the first aspect of the present invention, when a resin molded body containing a thermoplastic resin as a main raw material is decomposed, the resin molded body is subjected to any method of coating, spraying, spraying, or dipping. A decomposition treatment liquid for a resin molded body to be adhered is provided, wherein the decomposition treatment liquid contains manganese oleate and cerium oleate.

また、本発明の第2の発明によれば、第1の発明において、前記オレイン酸マンガン及びオレイン酸セリウムを含むオレイン酸液を希釈していることを特徴とする樹脂成型体の分解処理液が提供される。 Further, according to the second invention of the present invention, in the first invention, the decomposition treatment liquid of the resin molded body, which is characterized in that the oleic acid liquid containing manganese oleate and cerium oleate is diluted. Provided.

また、本発明の第3の発明によれば、第1の発明において、前記オレイン酸マンガン及びオレイン酸セリウムは石油炭化油を用いて希釈されていることを特徴とする樹脂成型体の分解処理液が提供される。 Further, according to the third aspect of the present invention, in the first invention, the manganese oleate and the cerium oleate are diluted with petroleum carbide, and the decomposition treatment liquid for the resin molded body is characterized. Is provided.

また、本発明の第4の発明によれば、第2または3の発明の何れかにおいて、前記オレイン酸マンガン及びオレイン酸セリウムは、終濃度で約10重量パーセント以下に設定されることを特徴とする樹脂成型体の分解処理液が提供される。 Further, according to the fourth aspect of the present invention, in any of the second or third inventions, the manganese oleate and the cerium oleate are set to about 10% by weight or less at the final concentration. A decomposition treatment liquid for the resin molded body to be used is provided.

また、本発明の第5の発明によれば、第1の発明において、生分解性材料を含む前記樹脂成型体に付着されることを特徴とする樹脂成型体の分解処理液が提供される。 Further, according to the fifth aspect of the present invention, there is provided a decomposition treatment liquid for a resin molded body, which is characterized in that it is adhered to the resin molded body containing a biodegradable material in the first invention.

また、本発明の第6の発明によれば、第1の発明において、生分解性材料を含まない前記樹脂成型体に付着されることを特徴とする樹脂成型体の分解処理液が提供される。 Further, according to the sixth aspect of the present invention, there is provided in the first invention a decomposition treatment liquid for a resin molded body, which is characterized by being adhered to the resin molded body containing no biodegradable material. ..

また、本発明の第7の発明によれば、第1の発明にかかる樹脂成型体の分解処理液を用いて、成形時に該樹脂成型体に添加すると共に、該樹脂成型体の製造後分解前に塗布、散布、噴霧、又は浸漬の何れかの手法により前記樹脂成型体に前記分解処理液を付着させることを特徴とする樹脂成型体の分解処理方法が提供される。 Further, according to the seventh invention of the present invention, the decomposition treatment liquid of the resin molded body according to the first invention is added to the resin molded body at the time of molding, and after the resin molded body is manufactured and before decomposition. Provided is a method for decomposing a resin molded body, which comprises adhering the decomposition-treated liquid to the resin-molded body by any method of coating, spraying, spraying, or dipping.

本発明によれば、熱可塑性樹脂、特に、ポリオレフィン系樹脂を主原料とする樹脂成型体において、製造時の機械的強度、耐水性、耐薬品性を損なうことなく、また、特定の処分手段を取らずとも当該樹脂成型体の分解処理が可能な樹脂成型体の分解処理液を提供することができる。 According to the present invention, in a resin molded body made of a thermoplastic resin, particularly a polyolefin-based resin, a specific disposal means can be provided without impairing the mechanical strength, water resistance, and chemical resistance at the time of manufacture. It is possible to provide a decomposition treatment liquid for a resin molded body that can be decomposed without taking the resin molded body.

分解処理液を塗布したフィルムの外観変化並びに力学特性(引張強度及び引張伸び)試験を説明する図である。It is a figure explaining the appearance change and the mechanical property (tensile strength and tensile elongation) test of the film coated with the decomposition treatment liquid. 分解処理液を塗布したフィルムの外観変化を表す図である。It is a figure which shows the appearance change of the film to which the decomposition treatment liquid was applied. 分解処理液を塗布したフィルムの力学特性(引張強度及び引張伸び)試験の試験結果を表すグラフである。It is a graph which shows the test result of the mechanical property (tensile strength and tensile elongation) test of the film coated with the decomposition treatment liquid. 分解処理液を塗布した樹脂成型体のフィールド試験の試験結果を表す図である。It is a figure which shows the test result of the field test of the resin molded body to which the decomposition treatment liquid was applied.

以下、本発明の樹脂成型体の分解処理液について詳細に説明する。まず、本発明に係る酸化数が異なる複数の脂肪酸金属塩とは、動植物由来の油脂から得られた脂肪酸と酸化数が異なる金属(塩)とが組み合わされた化合物をいい、本発明では、当該脂肪酸金属塩を複数含む分解処理液を塗布、散布、噴霧、又は浸漬の何れかの手法により樹脂成型体の表面に付着させることで当該樹脂成型体を分解処理するものである。本発明に係る分解処理は、以下の2ステップで進行するものと考えられている。 Hereinafter, the decomposition treatment liquid for the resin molded product of the present invention will be described in detail. First, the plurality of fatty acid metal salts having different oxidation numbers according to the present invention refer to compounds in which fatty acids obtained from fats and oils derived from animals and plants and metals (salts) having different oxidation numbers are combined. The resin molded body is decomposed by applying a decomposition treatment liquid containing a plurality of fatty acid metal salts to the surface of the resin molded body by any method of coating, spraying, spraying, or dipping. The decomposition process according to the present invention is considered to proceed in the following two steps.

ステップ1:太陽光(紫外線)、熱、酸素、又は水等をエネルギー元とし、金属元素の触媒効果により生成した脂肪酸のラジカル成分が樹脂成型体を構成する樹脂の炭素-炭素結合を酸化分解する。これにより、樹脂成型体の物性(強度、伸び)や分子量が低下することになる。 Step 1: Using sunlight (ultraviolet rays), heat, oxygen, water, etc. as an energy source, the radical component of the fatty acid generated by the catalytic effect of the metal element oxidatively decomposes the carbon-carbon bond of the resin constituting the resin molded body. .. As a result, the physical characteristics (strength, elongation) and molecular weight of the resin molded body are lowered.

ステップ2:ステップ1において形成された酸化低分子化物(例えば、カルボン酸、アルコール類)は、土中やコンポスト環境中の微生物により消化吸収される。最終的には、バイオマスとして微生物の体内に蓄えられると共に、呼吸等の代謝活動により二酸化炭素や水に変化する(微生物分解)。 Step 2: The oxidative low molecular weight products (for example, carboxylic acids and alcohols) formed in step 1 are digested and absorbed by microorganisms in the soil and compost environment. Eventually, it is stored as biomass in the body of microorganisms and is converted into carbon dioxide and water by metabolic activities such as respiration (microbial decomposition).

本発明においては上記分解処理液を樹脂成型体に付着させることで、まずは上記ステップ1の分解処理を開始させる。樹脂成型体への分解処理液の付着は、例えば、筋交い刷毛、平刷毛、寸胴刷毛、ローラ、コテ刷毛等を用いた塗布、散布機、エアブラシ、スプレー缶、霧吹き、噴霧機等を用いた散布、噴霧によって行うことができる。また、生産性の向上を図る上で、分解処理液で満たした容器に樹脂成型体を浸漬することによって分解処理液を直接付着させてもかまわない。特に、樹脂成型体がフィルム状やシート状である場合、繰出しローラで繰出した樹脂成型体を容器内の分解処理液に潜らせることにより当該分解処理液を付着させ、巻き取りローラで巻き取ることも無論可能である。 In the present invention, the decomposition treatment liquid of the above step 1 is first started by adhering the decomposition treatment liquid to the resin molded body. Adhesion of the decomposition treatment liquid to the resin molded body is, for example, application using a brace brush, a flat brush, a body brush, a roller, a trowel brush, etc. , Can be done by spraying. Further, in order to improve productivity, the decomposition treatment liquid may be directly adhered by immersing the resin molded body in a container filled with the decomposition treatment liquid. In particular, when the resin molded body is in the form of a film or a sheet, the resin molded body unwound by the feeding roller is submerged in the decomposition treatment liquid in the container to adhere the decomposition treatment liquid, and the resin molded body is wound by the take-up roller. Of course, it is possible.

ところで、樹脂成型体に対する分解処理液の付着は、樹脂成型体の表面全体に対して行ってもよいし、樹脂成型体の表面の一部分に対してだけ行ってもよい。樹脂成型体表面に対する分解処理液の付着面積を制御することにより、分解処理の完了時間を速めたり、逆に遅くすることができるため、幅広い使用目的での分解性樹脂製品の提供が可能となる。加えて、本発明は、略完成品の樹脂成型体に対して分解処理液を付着させる形態であるため、樹脂成型体本来の機械的強度、耐水性、耐薬品性を損なうことがないという利点も有する。 By the way, the decomposition treatment liquid may be adhered to the entire surface of the resin molded body, or may be applied only to a part of the surface of the resin molded body. By controlling the adhesion area of the decomposition treatment liquid to the surface of the resin molded body, the completion time of the decomposition treatment can be accelerated or, conversely, delayed, so that it is possible to provide a decomposable resin product for a wide range of purposes. .. In addition, since the present invention is in the form of adhering the decomposition treatment liquid to the resin molded body of a substantially finished product, there is an advantage that the original mechanical strength, water resistance, and chemical resistance of the resin molded body are not impaired. Also has.

本発明に係る脂肪酸金属塩に含まれる金属元素としては、例えば、チタン、バナジウム、クロム、マンガン、鉄、コバルト、ニッケル、銅、亜鉛、ジルコニウム、ニオブ、モリブテン、テクネチウム、ルテニウム、パラジウム、銀、カドミウム等の何れかの遷移金属元素と、例えば、スカンジウム、イットリウム、ランタン、セリウム、プラセオジム、ネオジム、プロメチウム、サマリウム、ユウロピウム、ガドリニウム、テルビウム、ジスプロシウム、ホルミウム、エルビウム、ツリウム、イッテルビウム、ルテチウム等の何れかの希土類金属元素との組み合わせを挙げることができ、塩として存在する際に、酸化数が異なる組み合わせであれば制限はなく、遷移金属元素と希土類金属元素との含有比も任意に設定することが可能である。 Examples of the metal element contained in the fatty acid metal salt according to the present invention include titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, technetium, ruthenium, palladium, silver and cadmium. And any of the transition metal elements such as scandium, ittrium, lanthanum, cerium, placeodim, neodym, promethium, samarium, europium, gadrinium, terbium, dysprosium, formium, erbium, turium, itterbium, lutetium and the like. A combination with a rare earth metal element can be mentioned. When present as a salt, there is no limitation as long as the combination has a different oxidation number, and the content ratio between the transition metal element and the rare earth metal element can be arbitrarily set. Is.

遷移金属元素と希土類金属元素との好適な組み合わせとして、遷移金属元素がマンガン(酸化数:2価、3価)と希土類金属元素がセリウム(酸化数:3価、4価)との組み合わせを例示することができる。 As a suitable combination of the transition metal element and the rare earth metal element, the combination of the transition metal element with manganese (oxidation number: divalent and trivalent) and the rare earth metal element with cerium (oxidation number: trivalent and tetravalent) is exemplified. can do.

本発明に係る脂肪酸金属塩に含まれる脂肪酸としては、例えば、炭素数が12個以上の長鎖脂肪酸であって、飽和脂肪酸又は不飽和脂肪酸である、ラウリン酸、ミリスチン酸、ペンタデジル酸、パルミチン酸、マルガリン酸、ステアリン酸、アラキジン酸、ヘンイコシル酸、ベヘン酸、リグノセリン酸、セロチン酸、モンタン酸、メリシン酸、ミリストレイン酸、パルミトレイン酸、サピエン酸、オレイン酸、エライジン酸、バクセン酸、ガドレイン酸、エイコセン酸、エルカ酸、ネルボン酸等を例示することができる。この中でも、反応性・安定性等の観点から不飽和脂肪酸であるオレイン酸を本発明に係る脂肪酸として用いるのが好ましい。 Examples of the fatty acid contained in the fatty acid metal salt according to the present invention include lauric acid, myristic acid, pentadigilic acid, and palmitic acid, which are long-chain fatty acids having 12 or more carbon atoms and are saturated fatty acids or unsaturated fatty acids. , Margaric acid, stearic acid, arachidic acid, henicosyl acid, behenic acid, lignoseric acid, cellotic acid, montanic acid, melicic acid, myristoleic acid, palmitoleic acid, sapienoic acid, oleic acid, elladic acid, baxenoic acid, gadrain acid, Eikosenoic acid, erucic acid, nervonic acid and the like can be exemplified. Among these, it is preferable to use oleic acid, which is an unsaturated fatty acid, as the fatty acid according to the present invention from the viewpoint of reactivity, stability and the like.

また、本発明に係る分解処理液は、例えば、鉱物油、高度生成基油、高粘度指数基油、化学合成油といった石油炭化油を用い所定の希釈率で希釈した上で樹脂成型体に塗布、散布、噴霧、又は浸漬の何れかの手法により付着させるのが好ましい。この中でも、特に、鉱物油である流動パラフィンを用い、脂肪酸金属塩のそれぞれが終濃度で約10重量%以下、好ましくは5.5重量%以下となるように希釈することで、ムラなく均一に分解処理液を樹脂成型体に付着させることができる。また、脂肪酸金属塩に含まれる脂肪酸が飽和脂肪酸の場合であっても、石油炭化油を用いて希釈することが可能である。 Further, the decomposition treatment liquid according to the present invention is applied to a resin molded body after being diluted with petroleum carbide such as mineral oil, highly generated base oil, high viscosity index base oil and chemically synthesized oil at a predetermined dilution ratio. , It is preferable to attach by any method of spraying, spraying, or dipping. Among these, in particular, liquid paraffin, which is a mineral oil, is used and diluted so that each of the fatty acid metal salts has a final concentration of about 10% by weight or less, preferably 5.5% by weight or less, so that the fatty acid metal salts are evenly and uniformly. The decomposition treatment liquid can be attached to the resin molded body. Further, even when the fatty acid contained in the fatty acid metal salt is a saturated fatty acid, it can be diluted with petroleum carbide.

本発明に係る樹脂成型体を形成する樹脂については、特に制限はないが、好適な例として、例えば、ポリエチレン、ポリプロピレン、ポリブタジエン、アクリル、ポリアセタール、ポリアミド、ポリエチレンテレフタレート、ポリカーボネート、ポリスチレン、ポリフェニレンサルファイド、ポリブチレンテレフタレート、ポリ塩化ビニル、ABS樹脂、AS樹脂等の熱可塑性樹脂が挙げられる。 The resin forming the resin molded body according to the present invention is not particularly limited, but suitable examples include, for example, polyethylene, polypropylene, polybutadiene, acrylic, polyacetal, polyamide, polyethylene terephthalate, polycarbonate, polystyrene, polyphenylene sulfide, and poly. Examples thereof include thermoplastic resins such as butylene terephthalate, polyvinyl chloride, ABS resin, and AS resin.

これらの中でも、特に、低密度ポリエチレン、中密度ポリエチレン、高密度ポリエチレン、直鎖状低密度ポリエチレン等のポリエチレン、プロピレンホモポリマー、プロピレンランダムポリマー、プロピレンブロックポリマー等のポリプロピレン、ポリブタジエン、ポリイソブレン及びこれらの水素添加物等のジエン系エラストマー等のオレフィン系樹脂が好適である。これらの樹脂は、単独で使用してもよいし、2種以上を併用することも可能である。 Among these, in particular, polyethylene such as low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, propylene homopolymer, propylene random polymer, polypropylene such as propylene block polymer, polybutadiene, polyisobrene and hydrogen thereof. Olefin-based resins such as diene-based polymers such as additives are suitable. These resins may be used alone or in combination of two or more.

また、本発明に係る樹脂成型体の形状についても特に制限はなく、例えば、シート状、フィルム状、ブロック状、ペレット状、繊維状等の何れか形状であってもよく、その成形方法としては、射出成形、押出成形、ブロー成形、真空成形、圧空成形、インフレーション成形といった樹脂成型体の形状に適した各成形方法を採用することができる。所定の形状に成形した樹脂成型体に対して、酸化数が異なる複数の脂肪酸金属塩を含む分解処理液を塗布、散布、噴霧、又は浸漬の何れの手法により付着させることで、例えば、フィルム・シート、容器類、機械用部品、パイプ、建材、日用品・雑貨、発泡製品、具体的には、農業用マルチフィルム、使い捨てオムツ、商品持ち帰り用袋、商品包装用袋、野菜用袋、食品用トレイ、飲料用カップ、ゴミ袋、土木用植生ネット、排水用プラスチックドレーン材、エアガン用BB弾、ハト風船、樹木保護材、菌類・植物栽培用袋といった各種の分解性樹脂製品としての使用が可能となる。 Further, the shape of the resin molded body according to the present invention is not particularly limited, and may be, for example, any of a sheet shape, a film shape, a block shape, a pellet shape, a fibrous shape, and the like, and the molding method thereof may be used. , Injection molding, extrusion molding, blow molding, vacuum molding, pneumatic molding, inflation molding, and other molding methods suitable for the shape of the resin molded body can be adopted. By applying a decomposition treatment liquid containing a plurality of fatty acid metal salts having different oxidation numbers to a resin molded body molded into a predetermined shape by any method of coating, spraying, spraying, or dipping, for example, a film. Sheets, containers, machine parts, pipes, building materials, daily necessities / miscellaneous goods, foam products, specifically, agricultural multi-film, disposable omelets, product take-out bags, product packaging bags, vegetable bags, food trays , Beverage cups, garbage bags, vegetation nets for civil engineering, plastic drain materials for drainage, BB bullets for air guns, pigeon balloons, tree protection materials, bags for fungal and plant cultivation, etc. Become.

なお、本発明は、樹脂成型体の製造時に添加される従来の分解処理剤と同様な使用方法を否定するものではない。すなわち、本発明では、樹脂成型体の成形時に分解処理液を添加することで当該分解処理液の成分を予め樹脂成型体に含ませることも無論可能である。この場合、製造時における樹脂成型体の機械的強度、耐水性、耐薬品性を損なわないような少量の分解処理液の添加が望ましい。このように、予め樹脂成型体に本願発明に係る分解処理液の成分を含ませておくことで、製造後付着させる分解処理液との相乗的な分解効果を期待することができる。 It should be noted that the present invention does not deny the same usage as the conventional decomposition treatment agent added at the time of manufacturing the resin molded body. That is, in the present invention, it is of course possible to include the components of the decomposition treatment liquid in the resin molding in advance by adding the decomposition treatment liquid at the time of molding the resin molding. In this case, it is desirable to add a small amount of decomposition treatment liquid so as not to impair the mechanical strength, water resistance, and chemical resistance of the resin molded body at the time of manufacture. As described above, by including the component of the decomposition treatment liquid according to the present invention in the resin molded body in advance, a synergistic decomposition effect with the decomposition treatment liquid to be adhered after production can be expected.

[実施例]
本発明に係る樹脂成型体の分解処理液による分解効果を検証するため以下に示す試験を行った。
(1)分解処理液塗布後の樹脂成型体の外観観察及び力学特性試験
シェルストーンMB80(株式会社バイオポリ上越製:CaCo3成分80重量%、LLDPE(直鎖状低密度ポリエチレン)コンパウンド)、既存デンプンバイオマス樹脂(米デンプン率70重量%)及び成形用希釈LLDPEを任意の割合でブレンドし、インフレーション成形により得られた樹脂成型体としてのフィルムに対し、脂肪酸金属塩として、(A)オレイン酸マンガン(30~40重量%)、(B)オレイン酸セリウム(10~20重量%)を含むオレイン酸液を流動パラフィンで各脂肪酸金属塩の終濃度が約5.5重量%となるように希釈した分解処理液をフィルム表面に塗布した後、遮光、80℃に維持した恒温乾燥機内に静置して経時変化における、フィルム外観並びに力学特性(引張強度及び引張伸び)を観察した。図1(a)は、観察用の枠付サンプルシートを表し、図1(b)は分解処理液が塗布された力学特性試験片セットを表している。なお、図1(a)において、図中左側枠内のみに分解処理液が塗布されており、図中右側枠内には分解処理液は塗布されていない。
[Example]
The following tests were conducted to verify the decomposition effect of the resin molded product according to the present invention by the decomposition treatment liquid.
(1) Appearance observation and mechanical property test of resin molded body after application of decomposition treatment liquid Shell Stone MB80 (Biopoly Joetsu Co., Ltd .: CaCo3 component 80% by weight, LLDPE (linear low density polyethylene) compound), existing starch biomass A resin (rice starch ratio 70% by weight) and diluted LLDPE for molding are blended in an arbitrary ratio, and the film as a resin molded product obtained by inflation molding is subjected to (A) manganese oleate (30) as a fatty acid metal salt. ~ 40% by weight), (B) Decomposition treatment of oleic acid solution containing (B) cerium oleate (10 to 20% by weight) diluted with liquid paraffin so that the final concentration of each fatty acid metal salt is about 5.5% by weight. After the liquid was applied to the surface of the film, the film was exposed to light and allowed to stand in a constant temperature dryer maintained at 80 ° C., and the appearance and mechanical properties (tensile strength and elongation) of the film were observed over time. FIG. 1 (a) shows a sample sheet with a frame for observation, and FIG. 1 (b) shows a set of mechanical property test pieces coated with a decomposition treatment liquid. In FIG. 1A, the decomposition treatment liquid is applied only to the inside of the left frame in the figure, and the decomposition treatment liquid is not applied to the inside of the right frame in the figure.

表1は、本試験で用いたサンプルの組成と試験前の力学特性試験結果とをまとめたものである。

Figure 0006993737000001
Table 1 summarizes the composition of the sample used in this test and the results of the mechanical property test before the test.
Figure 0006993737000001

今回の試験においては、サンプル#1(無機物成分:CaCo310重量%、有機物成分:米デンプン0重量%)、サンプル#2(無機物成分:CaCo320重量%、有機物成分:米デンプン0重量%)、サンプル#3(無機物成分:CaCo310重量%、有機物成分:米デンプン10重量%)の3種を準備した。各サンプルの試験前の力学特性(引張強度及び引張伸び)の値は表1に示した通りである。 In this test, sample # 1 (inorganic component: CaCo 310% by weight, organic component: rice starch 0% by weight), sample # 2 (inorganic component: CaCo 320% by weight, organic component: rice starch 0% by weight), sample # 3 types (inorganic component: CaCo 310% by weight, organic component: rice starch 10% by weight) were prepared. The values of the mechanical properties (tensile strength and tensile elongation) of each sample before the test are as shown in Table 1.

なお、今回の力学特性試験は、JIS Z1702 1種Bに準じ、引張強度規格値:≧170kgf/cm2、引張伸び規格値:≧250%とした。 In this mechanical property test, the tensile strength standard value: ≧ 170 kgf / cm2 and the tensile elongation standard value: ≧ 250% were set according to JIS Z1702 Class 1 B.

図2は、サンプル(#1~#3)毎のフィルム表面劣化の経時変化を示している。図2に示されるように、いずれのサンプルにおいても、試験開始後1日後から僅かではあるが、フィルム表面の劣化が進行しているのが分かる。そして、試験開始後28日目においては、劣化範囲がフィルム表面の略全域に亘り広がっているのが確認された(特に、サンプル#3)。サンプル#3は、有機物成分として米デンプンが10重量%含まれているため、分解処理液による酸化分解に加え、アミロース等の生分解性材料の加水分解も促進されたため、劣化範囲が拡大したものと考えられる。また、サンプル#1の観察結果からも明らかなように、サンプル#3のように、アミロース等の生分解性材料を含まなくとも、確実にフィルム表面の劣化が進行していることから、本発明に係る樹脂成型体の分解処理方法は有用であることが確認された。 FIG. 2 shows the time course of film surface deterioration for each sample (# 1 to # 3). As shown in FIG. 2, in any of the samples, it can be seen that the deterioration of the film surface is progressing, albeit slightly, from 1 day after the start of the test. Then, on the 28th day after the start of the test, it was confirmed that the deterioration range spread over substantially the entire surface of the film (particularly, sample # 3). Since sample # 3 contains 10% by weight of rice starch as an organic component, in addition to oxidative decomposition by the decomposition treatment liquid, hydrolysis of biodegradable materials such as amylose was promoted, so that the deterioration range was expanded. it is conceivable that. Further, as is clear from the observation result of the sample # 1, the deterioration of the film surface is surely progressing even if the biodegradable material such as amylose is not contained as in the sample # 3, and thus the present invention. It was confirmed that the method for decomposing the resin molded body according to the above is useful.

図3(a)は、サンプル(#1~#3)毎の引張強度の経時変化を表すグラフであり、図3(b)は、サンプル(#1~#3)毎の引張伸びの経時変化を表すグラフである。遮光、80℃に維持した恒温下での力学特性試験においては、図3(a)及び図3(b)の1-A、2-A、3-Aのそれぞれの点線で示されるように、試験開始3日目にはそれぞれの数値がJIS規格値よりも大きく下回る結果となった。実際に、試験開始後1週間目における分解処理液塗布サンプルは、力学特性を試験する際に図1(b)で示した各試験紙が治具に取り付け不可能な程、脆性となっており、図1(a)又は図2で示したように、フィルム表面も収縮による裂けが確実に目立つようになった。 FIG. 3A is a graph showing the change over time in the tensile strength of each sample (# 1 to # 3), and FIG. 3B is a graph showing the change over time in the tensile strength of each sample (# 1 to # 3). It is a graph showing. In the mechanical property test under light-shielding and constant temperature maintained at 80 ° C., as shown by the dotted lines of 1-A, 2-A, and 3-A in FIGS. 3 (a) and 3 (b). On the third day after the start of the test, each value was significantly lower than the JIS standard value. In fact, the decomposition treatment liquid-coated sample one week after the start of the test is so brittle that each test paper shown in FIG. 1 (b) cannot be attached to the jig when testing the mechanical properties. , As shown in FIG. 1 (a) or FIG. 2, tearing due to shrinkage became conspicuous on the film surface as well.

なお、官能的(感触)な脆性は試験開始後24時間で既に明からであり、この条件下における分解処理液の塗布による熱劣化(酸化)分解促進性が短時間で生じることを意味している。 It should be noted that the sensual (feel) brittleness is already apparent 24 hours after the start of the test, which means that the thermal deterioration (oxidation) decomposition promotion property due to the application of the decomposition treatment liquid under this condition occurs in a short time. There is.

(2)分解処理液を塗布した樹脂成型体のフィールド試験
上記試験(1)と同様に、脂肪酸金属塩として、(A)オレイン酸マンガン(30~40重量%)、(B)オレイン酸セリウム(10~20重量%)を含むオレイン酸液を流動パラフィンで各脂肪酸金属塩の終濃度が約5.5重量%となるように希釈した分解処理液を塗布したHDPE(高密度ポリエチレン)及びLDPE(低密度ポリエチレン)フィルムのそれぞれを実際の土壌雰囲気下で展張し、当該ポリエチレンフィルムの分解がなされるか否かを確認した。
(2) Field test of resin molded product coated with decomposition treatment liquid Similar to the above test (1), as fatty acid metal salts, (A) manganese oleate (30-40% by weight), (B) cerium oleate (B) HDPE (high density polyethylene) and LDPE (high density polyethylene) and LDPE (high density polyethylene) and LDPE (high density polyethylene) coated with a decomposition treatment solution obtained by diluting an oleic acid solution containing (10 to 20% by weight) with liquid paraffin so that the final concentration of each fatty acid metal salt is about 5.5% by weight. Each of the low-density polyethylene) films was stretched in an actual soil atmosphere, and it was confirmed whether or not the polyethylene film was decomposed.

フィールド試験の結果、分解処理液を塗布していないコントロールのポリエチレンフィルムについては、別途、紫外線照射、熱付与等の分解促進手段を講じても10日間その形態に変化は見受けられなかった。 As a result of the field test, no change was observed in the form of the control polyethylene film to which the decomposition treatment liquid was not applied for 10 days even if decomposition promoting means such as ultraviolet irradiation and heat application were separately taken.

これに対して、分解処理液を塗布したポリエチレンフィルムについては、図4(a)のHDPEフィルム、図4(b)のLDPEフィルムの試験結果で示されるように、試験開始後2日間でバラバラの状態となり、本発明に係る樹脂成型体の分解処理方法の有用性が確認された。 On the other hand, the polyethylene film coated with the decomposition treatment liquid was disjointed within 2 days after the start of the test, as shown in the test results of the HDPE film of FIG. 4 (a) and the LDPE film of FIG. 4 (b). It became a state, and the usefulness of the decomposition treatment method for the resin molded body according to the present invention was confirmed.

以上の結果より、本発明によれば、熱可塑性樹脂、特に、ポリオレフィン系樹脂を主原料とする樹脂成型体において、製造時の機械的強度、耐水性、耐薬品性を損なうことなく、また、特定の処分手段を取らずとも当該樹脂成型体の分解処理が可能な樹脂成型体の分解処理液及び分解処理方法を提供することができる。 From the above results, according to the present invention, in a resin molded body using a thermoplastic resin, particularly a polyolefin-based resin as a main raw material, the mechanical strength, water resistance, and chemical resistance at the time of manufacture are not impaired, and the resin molded body is not impaired. It is possible to provide a decomposition treatment liquid for a resin molded body and a decomposition treatment method capable of disassembling the resin molded body without taking specific disposal means.

また、本発明は、略完成品の樹脂成型体に対して分解処理液を付着させる形態であるため、分解性樹脂製品の製造プロセスの簡易化が可能であるとともに、製造コストも抑えることができる。さらに、樹脂成型体表面に対する分解処理液の付着面積や、分解処理液における脂肪酸金属塩の含有濃度を調整することにより、分解処理の完了時間を速めたり、逆に遅くするといった分解速度の制御が容易であることから、幅広い使用目的(分野)での分解性樹脂製品の提供が可能である。 Further, since the present invention is in the form of adhering the decomposition treatment liquid to the resin molded body of a substantially finished product, the manufacturing process of the degradable resin product can be simplified and the manufacturing cost can be suppressed. .. Furthermore, by adjusting the area of adhesion of the decomposition treatment liquid to the surface of the resin molded body and the content concentration of the fatty acid metal salt in the decomposition treatment liquid, the decomposition rate can be controlled by speeding up or slowing down the completion time of the decomposition treatment. Since it is easy, it is possible to provide degradable resin products for a wide range of purposes (fields).

Claims (7)

熱可塑性樹脂を主原料とする樹脂成型体を分解処理する際に、塗布、散布、噴霧、又は浸漬の何れかの手法により前記樹脂成型体に付着される樹脂成型体の分解処理液であって、
該分解処理液はオレイン酸マンガン及びオレイン酸セリウムを含むことを特徴とする樹脂成型体の分解処理液。
A decomposition treatment liquid for a resin molded body that is adhered to the resin molded body by any of coating, spraying, spraying, or dipping when the resin molded body containing a thermoplastic resin as a main raw material is decomposed. ,
The decomposition treatment liquid is a decomposition treatment liquid for a resin molded product, which comprises manganese oleate and cerium oleate.
請求項1記載の樹脂成型体の分解処理液であって、前記オレイン酸マンガン及びオレイン酸セリウムを含むオレイン酸液を希釈していることを特徴とする樹脂成型体の分解処理液。 The decomposition treatment liquid for a resin molded product according to claim 1, wherein the oleic acid liquid containing manganese oleate and cerium oleate is diluted. 請求項1記載の樹脂成型体の分解処理液であって、前記オレイン酸マンガン及びオレイン酸セリウムは石油炭化油を用いて希釈されていることを特徴とする樹脂成型体の分解処理液。 The decomposition treatment liquid for a resin molded product according to claim 1, wherein the manganese oleate and cerium oleate are diluted with petroleum carbide. 請求項2若しくは請求項3記載の樹脂成型体の分解処理液であって、前記オレイン酸マンガン及びオレイン酸セリウムは、終濃度で約10重量パーセント以下に設定されることを特徴とする樹脂成型体の分解処理液。 The decomposition treatment liquid for the resin molded product according to claim 2 or 3, wherein the manganese oleate and cerium oleate are set to a final concentration of about 10% by weight or less. Decomposition treatment liquid. 請求項1記載の樹脂成型体の分解処理液は、生分解性材料を含む前記樹脂成型体に付着されることを特徴とする樹脂成型体の分解処理液。 The decomposition treatment liquid for a resin molded body according to claim 1 is a decomposition treatment liquid for a resin molded body, which is characterized by being adhered to the resin molded body containing a biodegradable material. 請求項1記載の樹脂成型体の分解処理液は、生分解性材料を含まない前記樹脂成型体に付着されることを特徴とする樹脂成型体の分解処理液。 The decomposition treatment liquid for a resin molded body according to claim 1 is a decomposition treatment liquid for a resin molded body, which is attached to the resin molded body that does not contain a biodegradable material. 請求項1記載の樹脂成型体の分解処理液を成形時に該樹脂成型体に添加すると共に、該樹脂成型体の製造後分解前に塗布、散布、噴霧、又は浸漬の何れかの手法により前記樹脂成型体に前記分解処理液を付着させることを特徴とする樹脂成型体の分解処理方法。 The decomposition treatment liquid for the resin molded body according to claim 1 is added to the resin molded body at the time of molding, and the resin is coated, sprayed, sprayed, or immersed by any method after production of the resin molded body and before decomposition. A method for decomposing a resin molded body, which comprises adhering the decomposition treatment liquid to the molded body.
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JP2002235013A (en) 2001-02-13 2002-08-23 Kankyo Create:Kk Resin composition
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